Drive-gear for engines.



M. 0. CARTER & W. T. DAVIS.

DRIVE GEAR FOR ENGINES.

APPLICATION HLgI) MAY 28. 1906.

PATENTED MAR. s, 1908.

atfozmu usual .valve casing and steam chest 4.

UNITED STATES PATENT OFFICE.

MATTHEW O. CARTER AND WILLIAM T. DAVIS, OF TRAVELLERS REST, SOUTHCAROLINA.

DRIVE-GEAR FOR ENGINES.

Specification of Letters Patent.

Patented March 3, 1908.

Application filed May 28. 1906. Serial No. 319.200-

To all whom it may concern:

Be it known that we, MATTHEW O. CARTER and VVILLIAM T. DAVIS, citizensof the United States, residing at Travellers Rest, in the county ofGreenville and State of South Carolina, have invented certain new anduseful Improvements in Drive-Gears for Engines; and we do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to improvements in drive gears for engines.

The object of the invention is to provide a driving gear of thischaracter by which two revolutions will be imparted to the drive shaftand drive wheel of the engine to each stroke of the piston, therebyincreasing the speed of the drive shaft.

With the above and other objects in view, the invention consists ofcertain novel featiires of construction, combination and ar-.

rangement of parts, as will be hereinafter described and claimed.

In the accompanying drawings :Figure 1 is a side view, partly insection, of an engine, showing the application of the invention thereto;and Fig. 2 is a top plan view of the same.

Referring more particularly to the drawings, 1 denotes the engine whichmay be of any suitable construction, but which is here shown as ahorizontal engine having a cylinder 2 which is supported upon a suitablebase 3 and above which is arranged H110- n the cylinder 2 is arrangedthe usual piston ,5 to which is connected the piston rod 6, the outerend of which is slidably mounted in a guide bracket 7 secured to theframe of the engine. a

In the valve casing 4'is arranged a slide valve 8, to which is connecteda stem 9, the

outer end of said stein being slidably mounted in a guide bracket 10, asshown. Pivotally mounted upon a bearing bracket 12 is a valve shiftinglever 13, one end of which is pivotally connected to the valve stem 9and the other end pivotally connected to the pistonrod 6. Thearrangement of the valve shifting-lever 13 is such that when the'pistoncured an eccentrically arranged wrist pin 17,

to which is iivotally connected one end of a link 18, t other end of thelink being pivotally connected to the iston rod 6. The length of thelink 18 and t e arrangement of the same on the plate and on the pistonrod is such that at' each complete reciprocation of the piston, saidplate and the drive shaft 14 will be given two revolutions therebygreatly increasing the speed of the drive, shaft.

From the foregoing description, taken in connection with theaccompanying drawings, the construction and operation of the inventionwill be readily understood without requiring a more extendedexplanation.

Various changes in the form, proportion and the minor details ofconstruction may be resorted .to without departing from the principle orsacrificing any of the advantages of this invention.

Having thus described our invention, what we claim as new and desire tosecure by Letters-Patent, is

In a drive gear for engines, supports, a rectilinearly reciprocatory rodmounted therein,

a shaft, one end of which is adjacent to said rod and provided with awrist pin, a link pivotally secured at one end to said pin and at theother to said rod intermediate its ends, the length of the link and theconnection thereof with the rod and the pin being such that at eachcomplete reciprocation of the rod the shaft. will be given tworevolutions,

and means for reciprocating the rod.

In testimony whereof we have hereunto set our hands in presence of twosubscribing witnesses.

i\IAl"IIlEV\ O. CARTER. WILLIAM T. DAVIS.

'itnesses J. A. MCDANIEL, E. A. McBEE.

